Edging machine



Sept. so 1924, I swgm.

A.E.MAYNARD EDGING MACHINE Filed May 20 1920 INVENTOR ATTORNEYQSv A; I BY Patented Sept. 30, 1924.

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ALBERT E. MAYNARD, SOUTHBRQZIDGE, MASSACHUSETTS, ASSIGNOR TO AMERICAN OPTICAL COMPANY, 0'1 SOUTHBB IEGE. A VOLUNTARY ASSOCIA- TIDN 01E MASSACHUSETTS.

EDGING MACHINE.

Application filed May 20,

T 0 all whom it may concern:

Be it known that I. ALBERT l5. MAYNARD, a citizen of the United States, residing at Southbridge, in the county oi? Worcester and State of Massachusetts, have invented certain new and useful Improvements in Edging Machines, of which the following is a specification.

This invention relates to improvements in machinery and has particular reference to a novel and improved construction particularly adapted for use in connection with machines for edging ophthalmic lenses.

The principal object of the present invention is the provision of novel and i.m proved means permitting of instant adjustment to vary the size or shape of lens to be automatically edged by the machine.

A. further object of the present invention is the elimination of large and ungainly parts and the substitution of a simple and compact device which shall be less cumbersome and awkward in character, shall be capable of instant adjustment, and shall be so con ucted as to be capable of use in connection with any shape or size of former or battery of formers without being especially constructed for use in connection with such battery, and will be so constructed as to satisfactorily engage the particular former of the battery desired without having parts which might by any possibility contact with other of said formers.

Further objects of the invention include the simplification of construction and improvement in details substantially as hereinafter described, and it will be understood that I may make any modifications in the specific details of construction shown and described within the scope of the appended claims without departing from or exceeding the spirit of my invention.

Figure I represents a fragmentary plan view of an edging machine equipped with my improvement.

Figure II represents a sectional view taken as on the line II-II of Figure I.

Figure III represents a detail view.

In the drawings, the numeral 1 designates the main frame of an edging machine having the swinging head 2 in which is journaled the lens clamp spindle 3, which at its inner end is provided with a clamp 4 for the lenses 5 to be edged by the stone 6, and

1920, Serial No. 382,802.

at its outer end may be equipped with a battery of formers designated as an entirety by the numeral. 7. In my improved form of invention I form on the frame 1 the former contact shoe support 8 having the guide socket 9 in which is slidably engaged the tube 10 internally threaded for engagement with the adjusting screw 11 having the head 12 at the front of the machine and provided with a suitable indicator 13 cooperating with. the dial 14 to denote the in and out adjustment of the tube 10. Said tube 10 has secured to its rear portion the web 1 on the contact shoe block 16 which extends upward through a slot 17 in the support 8 and is slidable on the upper face of the support. Said block 16 has its upper face preferably disposed at an angle for the sake of convenience and is formed with the guide way or groove 18 extending transversely thereof, in which slides the rib 19 of the plate 20 which is of L form having a depending portion 21 extending over and sliding on the front face of the block 16. This portion 21 serves as a support for the forwardly projecting relatively thin plate member 22 which is'the contact shoe proper and is adapted to be selectively engaged as desired with the different formers 7. To control said selective engagement the plate 20 has formed on its rear edge the rack 23 meshing with the pinion 2-1 rotatably mounted on the block 16 by the spindle 25 which has secured on its upper end the o 'ierating handle 26. This handle 26 is disposed above the cap plate 27 and is provided with a spring pressed locking pin 28 adapted to be selectively engaged in the various apertures 29 of the cap plate. Said apertures are suitably designated as by the numerals or indications 30, or the like, to indicate the particular former which the shoe will engage when the pin 28 is locked in a certain selected aperture. A spring 31 contained within a socket in the handle 26 serves to normally press the pin 28 into locking position.

From the foregoing description the construction of my improved contact shoe adjusting mechanism should be readily apparent and it will be seen that swinging or rocking movement of the handle 26 will through the action of the pinion 24 and rack 23, serve to laterally shift the plate 20 and contact shoe 22 so that the shoe is selectively engaged with any desired former, being locked in adjusted position through inter-engagement of the pin 28 and suitable recess 29 in the cap plate 27, while the size of lens 5veclged is controlled through in or out adjustment of theshoe by rotation of the adjusting screw 11, the shape being controlled by the selected engagement of the contact shoe and proper former. It will be particularly noted that the contact shoe projects suliiciently beyond the plate which car i'ies it so that it will. engage with the small- ,est diameter of the smallest former while holding the largest diameter ilorward and out of contact with the backing plate, and it may be shifted with. extreme rapidity and utmost accuracy, while on account of the diagonal positioning of the cap plate 27 the designations 30 may he most clearly seen.

I claim:

1. In a device of the character described, the combination with a supporting member,

7 a tube slidably mounted therein, means for adjusting said tube within the support and a block movable with the tube and formed with the guide way, of a. plate having a member slidably engaged in the guide way, said plate having arack portion and a contact shoe, a pinion meshing with the rack portion for adjusting the plate upon the block, means for rotating the pinion to accomplish. such adjustment and means for locking the parts in the desired adjusted position, said means including a plurality of sockets formed on the block and a pin for selective engagement in the socket.

2. In a device of the character described, the combination with a supporting member,

a sliding tube carried by the supporting member, means tor slidal'il adjusting said tube with respect to the supporting member and a biock carried by the tube and formed with a guide way. of a plate having a ineinher slidahl engaged in the guide way, said plate having a rack portion and a contact shoe, a pinion meshing with the ra k portion for adjusting the plate upon the block, means for rotating the pinion to accomplish such aiiljustnient, means for locking the part s in the desired adjusted position. said means including a plurality oi SOPhOtH formed on the blocl-z, a pin for selective engagement in the sockets and indicating moans disposed adjacent the sockets to denote the :ldjllrlment attained for various positions oi the locking pin.

3. in a lens grinding machine, the cornbination with a battery of formers rotatable with the lens clamping shaft. of a contact shoe adapted to selectively engage any one of the formers, a racl: carried by the shoe. a block slidahl supporting the shoe, a, pinion meshing with the racl; and mounted in the block, an adjustingarm secured to the pin-- ion, a latch mechanism carried by the Free end of the arm and adapted to lock the arm and associated parts in adjusted position with relation to the block. and a trans \ersely adjustable carriage suporting the block and movable in a plane at right angles to that (it the contact shoe.

in testimony whereof I have allixod my signature, in presence of two witnes es.

)aLlilhl' E. MAYY) lll lVitnesses:

ESTHER ll. Larmcn, Anion (l. Hasiinnn 

